[INFO] fetching crate atomic_box 0.1.1...
[INFO] checking atomic_box-0.1.1 against master#7f5a42b073dc2bee2aa625052eb066ee07072048 for pr-78991
[INFO] extracting crate atomic_box 0.1.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate atomic_box 0.1.1 on toolchain 7f5a42b073dc2bee2aa625052eb066ee07072048
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate atomic_box 0.1.1
[INFO] finished tweaking crates.io crate atomic_box 0.1.1
[INFO] tweaked toml for crates.io crate atomic_box 0.1.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 89e7e2daff6bd89ce74f11ba106e1b8c72fb49fecaa87c4fb8e7669878ff1c8b
[INFO] running `Command { std: "docker" "start" "-a" "89e7e2daff6bd89ce74f11ba106e1b8c72fb49fecaa87c4fb8e7669878ff1c8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "89e7e2daff6bd89ce74f11ba106e1b8c72fb49fecaa87c4fb8e7669878ff1c8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89e7e2daff6bd89ce74f11ba106e1b8c72fb49fecaa87c4fb8e7669878ff1c8b", kill_on_drop: false }`
[INFO] [stdout] 89e7e2daff6bd89ce74f11ba106e1b8c72fb49fecaa87c4fb8e7669878ff1c8b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e198696adfc2dcf460e35b7d1393bfd44fa6c593cb8022f8cf676733d8fb211
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4e198696adfc2dcf460e35b7d1393bfd44fa6c593cb8022f8cf676733d8fb211", kill_on_drop: false }`
[INFO] [stderr]     Checking atomic_box v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/test.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |             for i in 0..1024 {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/test.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |     for i in 0..num_threads {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `print_thread`
[INFO] [stdout]   --> src/test.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let print_thread = {
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_print_thread`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "4e198696adfc2dcf460e35b7d1393bfd44fa6c593cb8022f8cf676733d8fb211", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e198696adfc2dcf460e35b7d1393bfd44fa6c593cb8022f8cf676733d8fb211", kill_on_drop: false }`
[INFO] [stdout] 4e198696adfc2dcf460e35b7d1393bfd44fa6c593cb8022f8cf676733d8fb211